Color-Tuned Electroluminescence from Columnar Liquid Crystalline Alkyl Arenecarboxylates

Haßheider, Thomas; Benning, Stephan A.; Kitzerow, Heinz‐S.; Achard, M. F.; Böck, Harald

doi:10.1002/1521-3773(20010601)40:11<2060::aid-anie2060>3.3.co;2-8

Cited by 67 publications

(101 citation statements)

References 0 publications

Supporting

Mentioning

100

Contrasting

Order By: Relevance

“…Figure 2b,c shows the j-V-L characteristics and EQE of the best Spiro-TTB device. A luminance of 181 cd m −2 was reached at 20 V, similar to previous results, [22,27,28] and the EQE showed a maximum of 0.08%. Upon annealing of the device to 120 °C, we observed an increase in charge transport, especially at lower voltages.…”

Section: Simple Oleds With Ptcte Emittersupporting

confidence: 90%

“…With the broad emission spectrum observed, we believe that this emitter holds also great potential for creating simple white OLEDs with high color rendering, even without using additional emitters as suggested in ref. [27].…”

Section: Discussionmentioning

confidence: 99%

“…[24][25][26] The use of perylene derivatives in OLEDs has been explored by several groups, however, most studies primarily focused on physicochemical properties of materials and their potential applications rather than device performance and characteristics. Hence, emitters were only incorporated in simple OLED structures which often required drive voltages >8 V and achieved a maximum luminance of mostly <1000 cd m −2 at voltages higher than 10 V, [27][28][29][30][31] similar to other studies of liquid crystal-based OLEDs. [17,[32][33][34][35] In order to develop more efficient liquid crystalline OLEDs, the knowledge about the self-assembling properties of DLCs that the community has acquired over the past decades needs to be appropriately integrated with state-of-the-art OLED structures and with the functional materials used in these.…”

Section: Introductionmentioning

confidence: 90%

“…This structure served as a reference to compare to literature devices using similar bi-layer structures. [22,27,28] We used four different PTCTE thicknesses ranging from 50 to 110 nm. The complete OLED characteristics are shown in Figure S2, Supporting Information.…”

Section: Simple Oleds With Ptcte Emittermentioning

confidence: 99%

See 3 more Smart Citations

Organic Light‐Emitting Diodes Based on a Columnar Liquid‐Crystalline Perylene Emitter

Keum

Becker

Archer

et al. 2020

Advanced Optical Materials

Self Cite

View full text Add to dashboard Cite

Liquid crystalline materials possess great potential as emitters in organic light‐emitting diodes (OLEDs) due to their self‐assembling property, which may lead to anisotropic films and improved charge transport. Here, the key photophysical properties of the columnar liquid crystalline emitter perylene‐3,4,9,10‐tetracarboxylic tetraethyl ester (PTCTE) are investigated and the material is implemented into OLEDs. It is found that vacuum‐deposited PTCTE films exhibit preferential horizontal orientation of the transition dipole moment. Embedding the emitter into different host materials leads to increased photoluminescence quantum yield but reduces molecular orientation compared to the neat film. OLEDs containing PTCTE doped into an exciplex‐forming co‐host achieve very high luminance exceeding 10 000 cd m−2 at 5.7 V, which is among the best performances of OLEDs based on columnar liquid crystalline emitters reported so far.

show abstract

Section: Simple Oleds With Ptcte Emittersupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 90%

Section: Simple Oleds With Ptcte Emittermentioning

confidence: 99%

See 2 more Smart Citations

Organic Light‐Emitting Diodes Based on a Columnar Liquid‐Crystalline Perylene Emitter

Keum

Becker

Archer

et al. 2020

Advanced Optical Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Owing to their unique electronic and self‐healing properties, DLCs have been considered as potential materials for various device applications apart from energy and charge migration. They are extensively applied in organic light emitting diodes (OLEDs),− organic field effect transistors (OEFT),− photovoltaic solar cells,, and sensors, etc.…”

Section: Introductionmentioning

confidence: 99%

Charge Transport in Novel Phenazine Fused Triphenylene Supramolecular Systems

et al. 2018

View full text Add to dashboard Cite

Novel phenazine-fused triphenylene discotic liquid crystals (DLCs) tethered with alkanethiols and alkoxy chains are synthesized. The condensation of 4,5-dibromobenzene-1,2diamine with triphenylene-1,2-diquinone discotic core, followed by the reaction with alkanethiols gives heterocyclic phenazinefused triphenylene based DLCs. The intermediate dibromosubstituted phenazine and final alkanethiol substituted phenazine-fused triphenylene derivatives exhibit a wide range of stable enantiotropic hexagonal columnar phase, which was characterised by polarized optical microscopy (POM), differential scanning calorimetry (DSC) and X-ray diffraction (XRD) studies. We have also investigated the photophysical properties of all phenazine compounds using dilute solution of anhydrous chloroform. The charge carrier mobility was measured for one representative compound by time of flight method which revealed that phenazine-fused triphenylene discotic mesogen exhibits p-type (hole) mobility of the order of 10 À4 cm 2 V À1 s À1 . The novel mesogens reported here present a wide temperature stability with good charge mobility and optical properties. These mesogens have shown potential applications for solar cells, sensors, organic light emitting diodes and other electrooptical device applications.[a] A.

show abstract

A Full‐Color Electroluminescent Device and Patterned Photoalignment Using Light‐Emitting Liquid Crystals

Contoret²,

et al. 2005

View full text Add to dashboard Cite

show abstract

Color-Tuned Electroluminescence from Columnar Liquid Crystalline Alkyl Arenecarboxylates

Cited by 67 publications

References 0 publications

Organic Light‐Emitting Diodes Based on a Columnar Liquid‐Crystalline Perylene Emitter

Organic Light‐Emitting Diodes Based on a Columnar Liquid‐Crystalline Perylene Emitter

Charge Transport in Novel Phenazine Fused Triphenylene Supramolecular Systems

A Full‐Color Electroluminescent Device and Patterned Photoalignment Using Light‐Emitting Liquid Crystals

Contact Info

Product

Resources

About